L-2-amino-4-(2-{2-[2-(2-methoxyethoxy)ethoxy]ethoxy}acetyl)aminobutyric acid[(1H,1H,2H,2H,4H,4H,-3,6,9,12-tetraoxaperfluorotridecyl)methyl]amide 、
1,4,7-tris(carboxylatomethyl)-10-[1-carboxy-3-aza-4-oxo-5-methylpentan-5-yl]-1,4,7,10-tetraazacyclododecane, Gd complex 在
N-羟基丁二酰亚胺 、
N,N'-二环己基碳二亚胺 、
lithium chloride 作用下,
以
二甲基亚砜 为溶剂,
反应 16.0h,
以59%的产率得到L-2-[1,4,7-tris(carboxylatomethyl)-1,4,7,10-tetraazacyclododecane-10-N-(pentanoyl-3-aza-4-oxo-5-methyl-5-yl)]-amino-4-(2-{2-[2-(2-methoxyethoxy)ethoxy]-ethoxy}acetyl)aminobutyric acid[(1H,1H,2H,2H,4H,4H,-3,6,9,12-tetraoxaperfluorotridecyl)methyl]amide, Gd complex